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Characterization of Chemically Modified Pore Surfaces by Small Angle Neutron Scattering

Published online by Cambridge University Press:  21 February 2011

C. J. Glinka ,
L. C. Sandert ,
S. A. Wiset  and
N. F. Berk
C. J. Glinka
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
L. C. Sandert
Affiliation:
Center for Analytical Chemistry, National Institute of Standards and Technology, Gaithersburg, MD 20899
S. A. Wiset
Affiliation:
Center for Analytical Chemistry, National Institute of Standards and Technology, Gaithersburg, MD 20899
N. F. Berk
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
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Abstract

Small angle neutron scattering has been used to characterize the structure of linear hydrocarbon chains chemically grafted to the internal pore surfaces of microporous silica particles. The aim of this work has been to relate the structure of the bonded adsorbate layers in these particles to their performance in, for example, reverse-phase liquid chromatography. By filling the pore space in the modified silica with a solution that matches the scattering density of the silica framework, the scattering from the adsorbate layers is enhanced and provides a sensitive probe of the effective thickness, uniformity and degree of solvent penetration in the layers. Results are presented for both monomeric and polymeric phases of alkyl chains ranging from C8 to C30 bonded to silica particles with a mean pore size of 100 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 166: Symposium J – Neutron Scattering for Materials Science , 1989 , 415
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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